This (56k) and other B&W photos are from magazine Le Fana de l'Aviation, July 1995. They published great article Yak-3,
un reve de pilote and a lot of photos.

The Yak-3 was a lightweight interceptor development of the
Yak-1. It was one of the lightest and nimblest fighters of WWII (certainly of
mass-built), with a max weight of only 2550kg. This resulted in a fighter that had some limitations, but excelled in
fighter vs. fighter combat at low altitudes.

The M-107 engine originally planned was installed in the
Yak-3U, but that was too late for combat in WWII.